Attempts to add a new field to a feature class, including running geoprocessing tools involving field addition, fail and return the following error:
Error: ERROR 160333: The table was not found. Failed to execute <tool_name>
The file geodatabase accessed when running the process is created from an older version of ArcGIS Desktop, preventing any changes on a new version of ArcGIS Pro.
Run the Upgrade Geodatabase tool
The Upgrade Geodatabase tool upgrades the file geodatabase to match the current version of ArcGIS Pro used to run the file geodatabase. Refer to ArcGIS Pro: Upgrade Geodatabase (Data Management) for more information.
If the Upgrade Geodatabase tool fails, create a new file geodatabase and copy the feature datasets and feature class from the old file geodatabase